Don't allow edges in note block and explicitly exclude from executor

Author: Sg312

apps/sim/app/workspace/[workspaceId]/w/[workflowId]/workflow.tsx

@@ -1447,6 +1447,11 @@ const WorkflowContent = React.memo(() => {
 
         if (!sourceNode || !targetNode) return
 
+        // Prevent connections to/from note blocks (annotation-only, non-executable)
+        if (sourceNode.data?.type === 'note' || targetNode.data?.type === 'note') {
+          return
+        }
+
         // Prevent incoming connections to trigger blocks (webhook, schedule, etc.)
         if (targetNode.data?.config?.category === 'triggers') {
           return

apps/sim/executor/consts.ts

@@ -21,6 +21,8 @@ export enum BlockType {
 
   WAIT = 'wait',
 
+  NOTE = 'note',
+
   SENTINEL_START = 'sentinel_start',
   SENTINEL_END = 'sentinel_end',
 }
@@ -31,7 +33,11 @@ export const TRIGGER_BLOCK_TYPES = [
   BlockType.TRIGGER,
 ] as const
 
-export const METADATA_ONLY_BLOCK_TYPES = [BlockType.LOOP, BlockType.PARALLEL] as const
+export const METADATA_ONLY_BLOCK_TYPES = [
+  BlockType.LOOP,
+  BlockType.PARALLEL,
+  BlockType.NOTE,
+] as const
 
 export type LoopType = 'for' | 'forEach' | 'while' | 'doWhile'
 

apps/sim/stores/workflows/workflow/store.ts

@@ -422,6 +422,14 @@ export const useWorkflowStore = create<WorkflowStore>()(
       },
 
       addEdge: (edge: Edge) => {
+        // Prevent connections to/from note blocks (annotation-only, non-executable)
+        const sourceBlock = get().blocks[edge.source]
+        const targetBlock = get().blocks[edge.target]
+
+        if (sourceBlock?.type === 'note' || targetBlock?.type === 'note') {
+          return
+        }
+
         // Check for duplicate connections
         const isDuplicate = get().edges.some(
           (existingEdge) =>